There is no structural premium grade, it is strictly a term for bright looking wood free of blemishes or knots. There are many other uses for pt lumber, including docks, boathouses, sheds, boardwalks, play structures, gazebos, and the list goes on. two existing joists with this stamp are not dark in color like i think pressure treated wood should be I used to live to work. The best pressure treated wood for decks is Select, #1 or #2 grade wood. The accredited inspection agency, manufacturer, and plant are also commonly on the label but may be available in the bar code. It's easy to work with. Records, trained personnel and an approved, properly equipped laboratory (either in-house or an approved external lab) are also required to complement the penetration and retention sampling requirements. Pressure Treated Lumber Grades, Types, and Uses Explained Even if you are on the right track, you will still get run over if you just sit there. It was widely used as a preservative from the mid-1930s to 2004. Grade Descriptions - Southern Pine SPIB also inspects mills that manufacture and label various lumber products under these rules. x 8 ft. #2 Prime or Better Ground Contact Pressure-Treated Lumber is a . The American Wood Protection Association (AWPA) sets the standards for the retention level required for the different chemical preservative compositions for specific types of use. As a result, we have more grades available to our customers now than at any other time in the history of our company. In the 19th-century railway companies used creosote to coat railway ties and timbers for bridges. I grabbed an exerpt here and there and put it all together, for I was on a lot of different sites and suppliers. An internet search says it has to do with less knots and quality, and that #1 is of higher quality. The ALSC also accredits third-party agencies, like SPIB, to inspect treating plants that produce treated lumber products with preservative systems listed in the American Wood Protection Association (AWPA) Book of Standards (BOS). The main difference between #1 and #2 is the slope of the wood grain, size, spacing, and the number of knots and holes, and the length of any splits. Georgia-Pacific Corporation Pressure Treated Lumber - GlobalSpec Provides good appearance with some of, Maximum recommended support spacing is 24" on center (16" on center for Imported Southern Pine), High-quality product, recommended where smallest knots are, Slightly less restrictive than premium grade. x 12 in. I hope you have a better understanding of what pressure treatment means and which grade and type is best for your project. An economical roof decking which conforms to No. 139 0 obj <> endobj 153 0 obj <>/Filter/FlateDecode/ID[]/Index[139 24]/Info 138 0 R/Length 80/Prev 801267/Root 140 0 R/Size 163/Type/XRef/W[1 2 1]>>stream It should be noted, #2 & BTR does not mean #1. Combination for B&B and C grades; satisfies requirements for. Tell us how we're doing! SPIB is committed to assisting our customers meet their treatment goals in the most cost-effective means possible. Please keep in mind, that with the advent of prime grades, the differences between the grades of lumber have become even more defined and distinct. o>>QS-RSnwO4piq4Szh+jkS3NQn(:;^unn^}Q8ws{7sFS hb```"/VI ealR]2L 7] u~m>^;+g=ll&Cv)!N&%5g~IK1 There is a barcode with product information, registration logo or symbol noting the standards followed, and the use category (UC4A for Ground Contact). I am finding lots of info about how HT (heat treated lumber) is required for packaging, pallets etc to prevent the spread of some WDO across the world but can not find anything concrete on whether or not it is suitable for a deck. PDF Treated Span Chart - Culpeper Wood Preservers No.2 Prime Email: cspsales@canfor.com. The quest for decent boards begins. The result of having a unified rating means the end-tag on lumber identifies how well the wood will stand up in different conditions, regardless of the chemical cocktail its been exposed to. The treated wood is then taken to the yard to dry naturally or to the drying kilns before shipping to the retailer. Recommended for moulding and millwork applications. Similar to MCA, the treated wood shouldnt be used in contact with food or animal feed. Tags: None The Duke Reasonably clear, but permits limited number of surface checks and small tight knots. As we can find no formal and simple description of all the different grades, we attempt to describe the grades that we currently stock so that you can decide what best fits your need and customer base. In appearance, it is at least 57% clear of defects. 6^,fniSgdc24.L7` b. Help a newbie identify treated wood? | LumberJocks Woodworking Forum Grademarks. This grade is available in dimensions of 24, 26, 28, 210, and 212 and in lengths from 8 through 24. Recommended for uses where high strength, stiffness and good appearance are desired. Most lumber in my area is listed as Prime or Premium depending on the box store and is stamped #2 or #2 & BTR. KD HT lumber vs PT lumber for deck - InterNACHI Forum See Finish grades for face side; reverse side wane limitations are lower. Modern chemical baths and pressurization began in the early half of the 20th century. Different chemical solutions are used to create treated lumber. As the wood dries, the preservative is left behind to protect against insects, mold, mildew, fungal growth, and rot. The type and dimension influence the strength of the timber. WestWood Heat Treated Lumber Production Corporation vapor-stabilization technology is a patented wood heat treatment technology, utilizing a natural thermochemical reaction and steam at temperatures of 230-240 C (450 F) and exclusive of any chemical additives. Southern yellow pine in the eastern U.S., spruce pine and fir in the northern U.S. and eastern-central Canada, and Douglas fir, fir, and hemlock in the western U.S. and Canada. A very good product to, Highest recognized grade of Finish. endstream endobj 146 0 obj <>/Filter/FlateDecode/Height 49/Intent/RelativeColorimetric/Length 6519/Metadata 150 0 R/Name/X/Subtype/Image/Type/XObject/Width 174>>stream UC3B or UC4A are best for ground contact use. Description & Documents #2 prime southern yellow pine with virtually no wane CA-C Above Ground pressure treated exterior wood protected by Ecolife (EL2); a stabilizing formula that repels water keeps boards straighter and looking better longer Ecolife (EL2) provides built-in water repellency that lasts for up to 3 it's primarily 2x planks. Framing lumber, unlike money, does grow on trees, so theres always the chance it will have some natural defect, such as a large knot or a long split, that can reduce its overall strength. The molecular changes in wood composition have a result of dimensional stabilization, protection against rot and wither, and as a result, expanded use opportunities. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. Raised floor homes look great and protect homeowners against risks from flooding and subsiding soils. I have to call this lady back again at COX lumber, I had called her about something else and she was very knowledgable. Superior product suitable for a wide range of uses including shelving, boxing, crating, and form lumber. The certification identifies the grade rules used to grade the lumber for example, ALSC is the American Lumber Standard Committee and NLGA is the National Lumber Grades Authority. Suitable for stud uses including use in load-bearing walls. The grade mark can include "1W" or "2W" if visually graded to the wane requirements for No.1 or No.2 dimension lumber, respectively. s It is the material of choice with both professionals and do-it-yourselfers for projects exposed to the rigors of weather, hot, humid climates, decay, and termites. SPIB is subject to continual review by IAS to ensure that the laboratory and agency records remain in compliance. To qualify for a SPIB grade-marking license, a mill must have verified credentials in the manufacturing, seasoning, and grading of Southern Pine lumber. The International Code Council Evaluation Service (ICC-ES) similarly approves preservative systems through its Evaluation Service Reports (ESRs). All rights reserved. Treated posts or ties readily available at yards and stores are 35, 44, and 66; 88 is also available but may be a special order. See Table 2 or SPIB Grading Rules for design values. Treated wood products must meet very specific quality requirements to meet the building code. A walk down the lumber aisle or through a lumberyard will provide some understanding of the differences between #1 and #2 grade pressure treated lumber, or increase your confusion. Tel: 843-236-9399. The grades are stamped prior to the wood being treated, so are the same for both treated and untreated. The pressure-treatment process Timber components, machined to their finished dimensions and at an appropriate moisture content, are impregnated with preservatives in large pressure vessels, where the combination of vacuum and high-pressure drives the preservative into the wood. Appearance is same as C Finish for thicknesses of 4" and less and widths 12" and less. Working with pressure treated lumber is similar to working with untreated planks. She said that some of the new PT looks so much like untreated they have to add a color enhancer to it. Ultimately, our program provides an economically sound and standardized method of treatment, evaluation, labeling and certification for producers, specifiers and end users of pressure treated wood products. End-glued, face-glued, and edge-glued Southern Pine in glued assemblies, including stress-rated grades of finger-jointed 2" Dimension Lumber. The preservatives provide protection against rot, insects, mold, and fungi, so the wood lasts longer. Green unseasoned lumber fresh from the mill is labeled either air-dried (AD) or surface-green (S-GRN). The label will show w/CE which means with color enhancement. It may have poor drainage and air circulation, or like a sill plate, is difficult to repair or maintain. JavaScript is disabled. Gloves protect against slivers and water-soluble chemicals; it is also advisable to thoroughly wash hands before eating or drinking. The Fora platform includes forum software by XenForo. No.1 Drop Siding is graded as No.1 Boards; No.1 Flooring and Paneling not provided under SPIB Grading Rules as a separate grade, but if specified, will be designated and graded as D. Graded as No.2 Boards. Recommended for uses where high strength, stiffness and good It has nothing to do with the wood being pressure treated (PT) at all. Even if you are on the right track, you will still get run over if you just sit there. 2023 Southern Pine Inspection Bureau | All Rights Reserved | SitemapP.O. The lumber has the structural strength it is graded with but has fewer blemishes or knots, so a better appearance. SYP Dimension Lumber Specifications | Canfor Denotes the woods species or a group of species with similar strengths. The longer the wood is in the pressure chamber, the greater the content of chemical preservatives forced into and retained in the wood. Here are the grades and types of lumber most commonly available, plus the percentage of clear wood you could expect for the appearance market or grade: Lumber with few or no knots or blemishes may be called premium by some mills or retailers to capitalize on DIYers wish for better-looking lumber.

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